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首页> 外文期刊>The Astrophysical journal >NUMERICAL SIMULATION OF EXCITATION OF SOLAR OSCILLATION MODES FOR DIFFERENT TURBULENT MODELS
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NUMERICAL SIMULATION OF EXCITATION OF SOLAR OSCILLATION MODES FOR DIFFERENT TURBULENT MODELS

机译:湍流模型对太阳振动模态激发的数值模拟

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The goal of this research is to investigate how well various turbulence models can describe the physical properties of the upper convective boundary layer of the Sun. Accurate modeling of these turbulent motions is necessary for understanding the excitation mechanisms of solar oscillation modes. We have carried out realistic numerical simulations using a hyperviscosity approach and various physical Large-Eddy Simulation (LES) models (Smagorinsky and dynamic models) to investigate how the differences in turbulence modeling affect the damping and excitation of the oscillations and their spectral properties and to compare with observations. We have first calculated the oscillation power spectra of radial and nonradial modes supported by the computational box with the different turbulence models, followed by calculation of the work integral input to the modes to estimate the influence of the turbulence model on the depth and strength of the oscillation sources. We have compared these results with previous studies and with the observed properties of solar oscillations. We find that the dynamic turbulence model provides the best agreement with the helioseismic observations.
机译:这项研究的目的是研究各种湍流模型如何很好地描述太阳上对流边界层的物理特性。这些湍流运动的精确建模对于理解太阳振荡模式的激发机制是必要的。我们已经使用高粘度方法和各种物理大涡模拟(LES)模型(Smagorinsky模型和动态模型)进行了逼真的数值模拟,以研究湍流模型中的差异如何影响振荡的阻尼和激发及其频谱特性,以及与观察结果比较。我们首先计算了具有不同湍流模型的计算框所支持的径向和非径向模式的振动功率谱,然后计算了输入到这些模式的功积分,以估算湍流模型对管道深度和强度的影响。振荡源。我们将这些结果与先前的研究以及太阳振荡的观测特性进行了比较。我们发现动态湍流模型提供了与日震观测的最佳一致性。

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